81569995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73819}}^1$

素因数の和:73854

約数の個数: 16

約数和(自身を含む): 111615840

約数和(自身を除く): 30045845

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 73819, 369095, 959647, 1254923, 4798235, 6274615, 16313999, 81569995]

約数ペア:

[(1, 81569995), (5, 16313999), (13, 6274615), (17, 4798235), (65, 1254923), (85, 959647), (221, 369095), (1105, 73819)]